Answer:
coefficient
Explanation:
Its the numerical coefficient definitely. Suppose
ax +by=c
Here a and b are the numerical coefficient of x and y respectively. And the c is the constant. The above is a linear simultaneous equation, with two variables and we need one more equation of same type to solve it. like
x + 3y=4
ax+by=5
And through the above two simultaneous equations we can solve the bove question. And since it is a line on a graph with two variables it is a linear equation with 2 variables.